*SUPPORT*
IN: zup fep dax OUT: YELLOW YELLOW YELLOW GREEN
IN: wif fep wif tufa OUT: RED RED RED RED RED RED RED
IN: lug OUT: BLUE
IN: dax zup tufa OUT: YELLOW GREEN GREEN
IN: lug tufa kiki OUT: BLUE BLUE BLUE BLUE
IN: zup zup tufa OUT: GREEN GREEN GREEN
IN: zup fep wif OUT: RED RED RED GREEN
IN: dax tufa kiki OUT: YELLOW YELLOW YELLOW YELLOW
IN: dax dax OUT: YELLOW YELLOW
IN: wif OUT: RED
IN: wif tufa kiki OUT: RED RED RED RED
IN: lug fep zup OUT: GREEN GREEN GREEN BLUE
IN: zup tufa fep zup fep wif OUT: RED RED RED GREEN GREEN GREEN GREEN GREEN
IN: lug kiki kiki OUT: BLUE BLUE BLUE BLUE

*QUERY*
IN: wif dax wif tufa OUT: RED YELLOW RED RED
IN: zup kiki kiki kiki OUT: GREEN GREEN GREEN GREEN GREEN GREEN GREEN GREEN
IN: dax OUT: YELLOW
IN: dax wif OUT: YELLOW RED
IN: dax tufa OUT: YELLOW YELLOW
IN: zup tufa OUT: GREEN GREEN
IN: zup OUT: GREEN
IN: wif tufa OUT: RED RED
IN: lug kiki OUT: BLUE BLUE
IN: lug zup OUT: BLUE GREEN

*GRAMMAR*
wif -> RED 
 zup -> GREEN 
 dax -> YELLOW 
 lug -> BLUE 
 u1 tufa -> [u1] [u1] 
 x1 fep x2 -> [x2] [x2] [x2] [x1] 
 x1 kiki -> [x1] [x1] 
 u1 x1 -> [u1] [x1] 
 